space physics Flashcards
(6 cards)
1
Q
name 8 planets in order from the sun
A
Mercury, Venus, Earth , Mars, Jupiter, Saturn, Uranus, Neptune
2
Q
what is the definition of a satellite
A
something that orbits the earth, the moon is a natural satellite
3
Q
what is a light year
A
the distance that light travels in a year
4
Q
what is gravity and what is it measured in
A
gravity is a force acting between 2 masses, it cause bodies to fall towards the centre of the earth, the weight of a body is the pull of gravity on it, it is measured in newtons (N)
5
Q
what is the equation for weight, mass and gravitational field strength
A
weight = mass x gravitational field strength (G)
6
Q
what is the conversion of KG to N on earth
A
on earth, G = 10N
100g = 1N or 1kg = 10N
